$OpenBSD: patch-CMakeLists_txt,v 1.8 2021/02/23 14:24:40 landry Exp $
Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -108,7 +108,10 @@ endif()
 option(BUILD_DOC "Build the HTML documentation (with doxygen if available)." OFF)
 
 string(TOLOWER ${PROJECT_NAME} projectname)
-set(OPENJPEG_INSTALL_SUBDIR "${projectname}-${OPENJPEG_VERSION_MAJOR}.${OPENJPEG_VERSION_MINOR}")
+
+if(NOT OPENJPEG_INSTALL_SUBDIR)
+  set(OPENJPEG_INSTALL_SUBDIR "${projectname}-${OPENJPEG_VERSION_MAJOR}.${OPENJPEG_VERSION_MINOR}")
+endif()
 
 if(NOT OPENJPEG_INSTALL_BIN_DIR)
   set(OPENJPEG_INSTALL_BIN_DIR "bin")
